Now, I could be wrong about this, but I believe the Odyssea MH bulbs are actually 175W(someone correct me if I'm wrong, please!)

I personally don't trust the Odyssea MH fixtures. Too much trial-and-error is involved with their product development. I've heard of people almost burning their houses down because of poor wiring in Odyssea MH fixtures, but then I've also seen some stores use them because they are easy on the wallet, and get the job done(if a little sub-par.) Their bulbs are not the best out there either, but once again, they are very inexpensive.

What I suggest is that you gut that fixture, and retrofit the whole thing with parts from other brands, like current or coralife. By doing that, you can get standard-wattage bulbs, a really nice reflector, a reliable set of internal electronics, and better quality light for your tank. At the end of the day you should have a very nice custom setup for a little less than one of the pre-made fixtures out there.

If you aren't good at electrical work, I'm sure there are some good people on this site that can help you out. If(by some bizarre stroke of fate) you don't find someone on here who can help out, ask one of your local fish store guys if they can do the work or if they know someone who can.